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마경탁,한승한,장지호,Kyoung-Tak Ma,M,D,Sueng-Han Han,M,D,Ji-Ho Chang,M,D 대한안과학회 2005 대한안과학회지 Vol.46 No.3
Purpose: The purpose of this paper was to determine the correlation between optokinetic nytagmus and grating and Snellen visual acuity charts and the validity of this correlation as an index. Methods: Diffusion blur was used to cause visual decrease in 24 patients with normal eyes. Vision was measured using 3 different methods. To compare the central and peripheral vision, visiual acuity was measured using a macula occluder. Results: Twenty four patients had an average uncorrected vision of 1.0 and showed regular visual acuity decrease using diffusion blur. Grating visual acuity showed correlation with the Snellen visual acuity but OKN visual acuity showed low correlation (p<0.05, ANOVA with repeated measure trend). OKN visual acuity showed low correlation with grating acuity when central visual acuity was occluded and only peripheral acuity was taken into consideration. Conclusions: Visual acuity measured using Snellen or grating acuity had little correlation with OKN visual acuity, and visual acuity measured using OKN was unable to indicate visual acuity in a quantitative manner.
김진선,이승구,이형근,이종복,한승한,Jinsun Kim,Seung-Koo Lee,Hyung Keun Lee,Jong Bok Lee,Sueng-Han Han 대한안과학회 2013 대한안과학회지 Vol.54 No.6
Purpose: To investigate the perception of 3-dimensional (3D) image after successful exotropia surgery and compare with Titmus stereo test. Methods: A total of 23 children who underwent surgery for intermittent exotropia and 28 normal children were evaluated with a 3D laptop computer and Titmus stereo test. Results: The mean minimal 3D scene depth level was 38.26 ± 19.69 in the exotropia group and 33.21 ± 16.11 in the normal group with no significant difference (p = 0.319). The mean stereoacuity was 60.97 ± 34.23 arc sec in the exotropia group and 76.69 ± 93.81 arc sec in the normal group with no significant difference (p = 0.444). The mean minimal 3D scene depth and mean stereoacuity showed statistically significant positive correlation in both the exotropia group (p = 0.024) and normal group (p = 0.026). Conclusions: After a successful exotropia surgery, patients can normally perceive 3D images. Better 3D image perception can be predicted if a previously established stereo test shows good results.